<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
            </el-col>
        </el-row>



        <!-- 表格 -->
        <tree-table class="treeTable" :data="catelist" :columns="columns"
         :selection-type="false" :expand-type="false"
         show-index index-text="#" border
         :show-row-hover="false">
         <!-- 是否有效 -->
            <template slot="isok" slot-scope="scope">
                <i class="el-icon-success"
                v-if="scope.row.cat_deleted === false"
                style="color:lightgreen;"></i>
                <i class="el-icon-error" v-else
                style="color:red;"></i>
            </template>
            <!-- 排序 -->
            <template slot="order" slot-scope="scope">
                <el-tag size="mini" 
                v-if="scope.row.cat_level===0">一级</el-tag>
                <el-tag type="success" size="mini"
                v-else-if="scope.row.cat_level===1">二级</el-tag>
                <el-tag type="warning" size="mini" v-else>三级</el-tag>
            </template>
            <!-- 操作 -->
            <template slot="opt" slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit"
                size="mini">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete"
                size="mini">删除</el-button>
            </template>
        </tree-table>


        <!-- 分页区域 -->
        <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="querInfo.pagenum"
      :page-sizes="[3, 5, 10, 15]"
      :page-size="querInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>



    </el-card>

    <!-- 添加分类的对话框 -->
    <el-dialog
  title="添加分类"
  :visible.sync="addCateDialogVisiable"
  width="50%"
  @close="addCateDialogClosed">
  <!-- 添加分类的表单 -->
<el-form :model="addCateForm" :rules="addCateFormRules" 
   ref="addCateFormRef" label-width="100px">
  <el-form-item label="分类名称：" prop="cat_name">
    <el-input v-model="addCateForm.cat_name"></el-input>
  </el-form-item>
  <el-form-item label="父级分类:" >
    <el-cascader
    expand-trigger="hover"
    :options="parentCateList"
    :props="cascaderProps"
    v-model="selectedKeys"
    @change="parentCateChanged" clearable change-on-select>
</el-cascader>
  </el-form-item>
</el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="addCateDialogVisiable = false">取 消</el-button>
    <el-button type="primary" @click="addCate">确 定</el-button>
  </span>
</el-dialog>
    </div>
</template>

<script>


    export default{
        data(){
            return{
                querInfo:{
                    //查询条件
                    type:3,
                    pagenum:1,
                    pagesize:5
                },
                //商品分类数据列表默认为空
                catelist:[],
                //总数据条数
                total:0,
                columns:[
                    {
                    label:'分类名称',
                    prop:'cat_name'
                },{
                    label:'是否有效',
                    //表示将单前列定义为模板页
                    type:'template',
                    //表示当前这一页使用的模板名称
                    template:'isok'
                },{
                    label:'排序',
                    //表示将单前列定义为模板页
                    type:'template',
                    //表示当前这一页使用的模板名称
                    template:'order'
                },{
                    label:'操作',
                    //表示将单前列定义为模板页
                    type:'template',
                    //表示当前这一页使用的模板名称
                    template:'opt'
                }
            ],
            //控制添加分类对话框的显示与隐藏
            addCateDialogVisiable:false,
            //添加分类的表单数据对象
            addCateForm:{
                cat_name:'',
                cat_pid:0,
                cat_level:0
            },
            addCateFormRules:{
                cat_name:[
                    {required:true,message:'请输入分类名称'
                    ,trigger:'blur'}
                ]
            },
            parentCateList:[],
            cascaderProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children'
            },
            //选择的父级分类的ID数组
            selectedKeys:[]
            }
        },
        created(){
            this.getCateList()
        },
        methods:{
            //获取商品分类数据
         async getCateList(){
          const {data : res} =  await this.$http.get('categories',{
            params:this.querInfo
        })
           
        if(res.meta.status  !==200){
            return this.$message.error('获取商品分类失败！')
        }

             console.log(res.data)
            this.catelist = res.data.result
            this.total = res.data.total
        },
        handleSizeChange(newSize){
            this.querInfo.pagesize = newSize
            this.getCateList()
        },
        //监听pagenum改变
        handleCurrentChange(newPage){
            this.querInfo.pagenum = newPage
            this.getCateList()
        },
        //点击按钮，展示添加分类的对话框
        showAddCateDialog(){
            this.getParentCateList()
            this.addCateDialogVisiable=true
        },
        //获取父级分类的数据列表
       async getParentCateList(){
         const{data:res} =  await  this.$http.get('categories',
         {params:{type:2} 
        })
        if(res.meta.status!==200){
            return this.$message.error('获取父级分类数据失败')
        }
                console.log(res.data)
                this.parentCateList = res.data
        },
        parentCateChanged(){
            console.log(this.selectedKeys)
            if(this.selectedKeys.length>0){
               this.addCateForm.cat_pid = this.selectedKeys[
                this.selectedKeys.length-1
            ]
            this.addCateForm.cat_level = this.selectedKeys.length
            return
            }else{
                this.addCateForm.cat_pid = 0
            
                this.addCateForm.cat_level = 0
            }
          },
          addCate(){
            this.$refs.addCateFormRef.validate(async valid=>{
                if(!valid) return 
                const {data:res} = await this.$http.post('categories',
                this.addCateForm)

                if(res.meta.status!==201){
                    return this.$message.error('添加分类失败！')
                }

                this.$message.success('添加分类成功！')
                this.getCateList()
                this.addCateDialogVisiable = false
            })
          },
          addCateDialogClosed(){
            this.$refs.addCateFormRef.resetFields()
            this.selectedKeys = []
            this.addCateForm.cat_level = 0
            this.addCateForm.cat_pid = 0

          }
        }
    }
</script>

<style lang="less" scoped>
.treeTable{
    margin-top: 15px;
}

.el-cascader{
    width: 100%;
}

</style>